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Miniature spectrometer with adjustable resolution ratio

A micro-spectrometer and resolution technology, which is applied in the field of micro-spectrometers, can solve the problems of the test spectral range and resolution limitation of a single micro-spectrometer, the limited rotation angle of MEMS, and the small size, and achieves compact structure, continuous translation, and low manufacturing cost. Effect

Active Publication Date: 2014-11-05
FUZHOU PHOTOP QPTICS CO LTD
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AI Technical Summary

Problems solved by technology

[0005] Due to the small size and the limited rotation angle of MEMS, the spectral range and resolution of a single micro-spectrometer are greatly limited

Method used

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  • Miniature spectrometer with adjustable resolution ratio
  • Miniature spectrometer with adjustable resolution ratio
  • Miniature spectrometer with adjustable resolution ratio

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] The invention utilizes the filtering characteristics of the double-cavity etalon, and uses a motor to drive the rotation of the cylinder turntable to drive wedge pairs with different wedge angles into the incident light path, and continuously scans the incident spectrum in segments, thereby improving the resolution of the spectrometer.

[0024] see figure 1 , this embodiment includes an incident optical path part, a reflected optical path part and a micro-drive unit, and the incident optical path part is provided with an input unit in turn, and the input unit is an optical fiber head 1 and a collimating unit, and the collimating unit is a collimating lens 2 and a transmission grating 8, the reflected light path part is provided with a light converging unit in turn, and the light converging unit is a cylindrical lens 10, a light bar 11 an...

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Abstract

The invention relates to the field of optical measurement, and discloses a miniature spectrometer with an adjustable resolution ratio. The miniature spectrometer comprises a miniature stepping motor, a plurality of wedge angle piece pairs with different wedge angles, a double-cavity etalon and an MEMS (micro-electromechanical system) with a reflector. The wedge angle piece pairs are mounted around the circumference of a cylindrical turntable according to the size sequence of the wedge angles. The wedge angle piece pairs are rotated by the miniature stepping motor, so that a test light beam enters the double-cavity etalon by continuous different angles, continuous translation of filter characteristics of the double-cavity etalon is realized by the aid of comb filter effects of the double-cavity etalon, and the transmission wavelength of the double-cavity etalon is changed. The spectrum test resolution ratio of the miniature spectrometer is increased, the problem of low resolution ratio of the miniature spectrometer is solved, and the miniature spectrometer is compact in structure and low in manufacturing cost.

Description

technical field [0001] The invention relates to the field of optical measurement, in particular to a miniature spectrometer with adjustable resolution. Background technique [0002] The analysis and real-time testing of material components has attracted more and more attention, and its testing technology is also developing continuously. Spectrometers are used in the analysis of material components, and the related equipment market is also continuously subdivided and expanded. At present, the demand for material composition analysis and real-time testing mainly comes from the following fields, such as food safety, biomedicine, gem identification, cultural relic identification, criminal identification, public safety, address prospecting, material science and environmental testing. [0003] Spectrometer test spectral range includes ultraviolet light, visible light, near-infrared and far-infrared and other band spectra. The spectrum test range of traditional spectrometers can r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/28G01J3/02
Inventor 吴砺郑保忠胡豪成林磊张新汉
Owner FUZHOU PHOTOP QPTICS CO LTD
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